12. How can a square be changed into some other 4-sided shape?
Answers
Answer:
4-sided polygons (Quadrilaterals)
After triangles, the type of shape we will encounter the most is the quadrilateral:
Quadrilateral : A polygon with four sides.
Quadrilaterals.svg
Note that in general the 4-gons can look pretty strange and irregular. There are a handful of special cases we care about. (See below)
Squares
Square: A quadrilateral with four equal-length sides and four right angles.
Squares.svg
Note that the square can be of differnt sizes and you are allowed to rotate it. Above are several examples of squares.
Rectangles
Rectangle: A quadrilateral having four right angles.
Rectangles.svg
Again, the rectangles come in different sizes and we can draw them at an angle if we want. As long as all the angles are 90 degrees, it will be a reactangle.
Parallelograms
Parallelogram: A quadrilateral with two pairs of parallel sides.
We haven't technically defined what parallel means, but it means that the two segments never meet, even if you were to continue tem infinitely far. Known examples are for instance the left and the right side of a ladder, or the double lines you see on some freeways.
Parallelograms.svg
Rhombuses
Rhombus
A quadrilateral having all four sides of equal length.
Rhombuses.svg
If you have played cards this is the shape of diamonds :)
Step-by-step explanation:
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